getting close to finishing my build
getting echo's ok though clock noise is a bit of an issue
at some settings, the trimmer has a limited effect seemingly at
different time settings and might actually
be be better placed on the front panel not sure on that yet though
the wet signal vactrol pan mod is working good now
just the gated invertor for regen mod and front panel markings to go

Quote:

There's just one part I can't seem to get my hands on:

Max362 or DG202B, as Dave suggested.

Any hints for a source, preferable in Europe?

I managed to get a DG202 thru element 14 some time ago
i also have a few DG412 spare so i could also try one out if you wish

"Five Pack" of PCBs for $249, mix or match formats. Still includes the extra bits plus a MAX362

hmm nice thought and very tempting i still have 8 tested and working MN3005 to put in something but i have been contemplating trying to come up with a board design that would use all 8 for a stereo delay with a wider bandwidth at long delay times still i maybe able to work it with 8 TM boards , it is an option

CV attenuators on all Cv in jacks
added a vactrol pan cct taken from the wet signal
with a gated inverter in front so a straight positive CV signal
from a seq can be used to pan to additional left and right outputs
also another gated inverter is set up on the regen CV in
which is kind of nice to use on very short delays ala flanging

Ok quick and nasty mp3
A bit of playing with the pan rate in the first half with delay time also being
varied by cv from a seq ,rythmic structure 2nd half is down to pulse width variation being narrowed manually on a fonik master clock with the TM delays playing a part. delay time is still being varied by a seq. the panning also reinforces the effect. key changes come from my one octave pedal board.

Ok quick and nasty mp3
A bit of playing with the pan rate in the first half with delay time also being
varied by cv from a seq ,rythmic structure 2nd half is down to pulse width variation being narrowed manually on a fonik master clock with the TM delays playing a part. delay time is still being varied by a seq. the panning also reinforces the effect. key changes come from my one octave pedal board.

That sounds nice and echoey, I'd love to hear it with guitar which is more my thing.

clean or down and dirty ? I think i can accomodate that maybe,
though signal levels maybe a bit iffy, will try it through a send channel
also i havent picked up any of my guitars for far too long so it
likely wont be good.

Ok Stephen hope this will surfice
did about a eleventy takes and of course ended up using the first one
like i said not likely to be good and now i have sore fingers
thats what i get for not picking up a guitar for last 12 months
so please excuse the playing.
anyway the time machine with pan is the only effect added bar some compression and a fender twin amp simulator to get something like a tone
the guitar's used is my DIY custom deep purple flying V
delay time is set to about the max i would go to before it all goes to mud
same with the regen i could maybe have added CV to a few things but i figured you were after a more straight echo effect
cheers
Denis

Ok Stephen hope this will surfice
did about a eleventy takes and of course ended up using the first one
like i said not likely to be good and now i have sore fingers
thats what i get for not picking up a guitar for last 12 months
so please excuse the playing.
anyway the time machine with pan is the only effect added bar some compression and a fender twin amp simulator to get something like a tone
the guitar's used is my DIY custom deep purple flying V
delay time is set to about the max i would go to before it all goes to mud
same with the regen i could maybe have added CV to a few things but i figured you were after a more straight echo effect
cheers
Denis

Excellent, many thanks that sounds wonderful. I can sympathise totally with the sore fingers!!Last edited by StephenGiles on Thu Mar 01, 2012 8:43 am; edited 1 time in total

I'm starting to populate my board and am finding everything ok except I don't know how to find those Resistor Networks. I found the resistor network section on Mouser but then I don't know what to look for after that. Can anyone give me a hand?
thanks,
steve

I'm starting to populate my board and am finding everything ok except I don't know how to find those Resistor Networks. I found the resistor network section on Mouser but then I don't know what to look for after that. Can anyone give me a hand?
thanks,
steve

Some background on the journey to find some legit MN3005s for the Blacet Time Machine...

As a result of my plan to have a number of large format Blacet Time Machines professionally assembled, I searched for sources of obsolete MN3005 BBD (bucket brigade delay) IC. The history of difficulty sourcing these ICs is well- documented in a number of forums:

Having invested the time to find these ICs in a meaningful quantity, it was important to provide documentation to overcome concerns about the validity of the ICs. We established a simple process for evaluating them:
1) Buying parts only from suppliers who have a track record of being able to provide genuine MN3005s in the past- no random e-bay buys. These sources are well-documented in the various forum posts as providing legit MN3005s. These ‘recognized’ suppliers act as the first line of defense against fakes. Approximately 3/4 of all orders placed were identified as ‘fakes’ by the supplier before shipping to me.
a. Of eleven ‘named’ suppliers, seven claimed to have stock of the MN3005, only four actually did.
b. The average price I paid across 160+ ICs is about $33 per.
2) Checking each IC against the visual clues that indicate fakes. These are well-documented in various forum posts, and include such items as pin size and length, condition of the top and bottom surfaces, expected logo and date codes, etc. Another good reference is http://www.aeri.com/counterfeits.html
3) Testing each IC against a reference chip by installing it in a testbed Blacet Time Machine- fully documented in youtube videos -- http://www.youtube.com/watch?v=cD6i3osyfZg

a. Acoustic test- video documentation of each IC demonstrated from ‘no delay’ to ‘full delay’ to compare the sound quality against a reference IC
b. Scope test- screenshot .jpg files for each IC for ‘no delay’ and ‘full delay’ states, to compare against the screenshots for the reference IC- using the Oscium scope app for the iPad
c. Visual inspection photos- macro-scale photos top and bottom for each IC

I find it useful to show how bad chips act, for comparison with the good chips. For those of you who care, the failure rate is about one in thirteen ICs across my sample set of 160+ chips.

Why the Blacet Time Machine?
It’s a unique module. Synth designers like Blacet (and others like him) deserve to have their good work recognized. The older parts make it special and unlikely to be replicated.

‘Families’ of MN3005 BBD IC
From the 160+ ICs I bought, there appear to be three ‘families.’ I do not have any production documentation from Panasonic nor Matsushita, but the ‘families’ could relate to different production facilities and/or timeframes.
A) ‘Shiny Top’ Triangle Logo ICs- these appear to be the oldest ICs. They have a shiny top surface, and the text is faded relative to the other ICs. They do not have the characteristic edge band around the circumference of the top. These ICs’ have an indent on the top of the chip that is ABOVE the logo and date code. The bottom indent lacks any text.
B) ‘Edge Band’ Triangle Logo ICs- these ICs have the visible edge band around the top of the IC and the triangle logo. These ICs have an indent on the top of the chip that is BELOW the logo and date code. The bottom indent contains some combination of letters and numbers usually two items but sometimes three.
C) ‘Circle Logo’ ICs- these have the logo described by an ‘M’ inside of a rounded box and would appear to be the newest of the ICs in this assortment.
When you listen to the videos, and view the scope traces, you’ll see very little correlation between the families and their resultant sounds; in other words, they appear to be interchangeable across families.

Disclaimers
I have acted in good faith to buy and test these ICs. I am a hobbyist I did this because I enjoy these devices and helping others enjoy them. I am not an engineer and this is not a full-time job. I cannot guarantee that these are ‘genuine’-- only that they work as demonstrated in the videos and pictures. These are electrostatically sensitive devices and although I take ESD precautions, they are subject to damage from static discharge. There is a good reason that highly qualified people like Steve Daniels at smallbearelec.com don’t have them anymore. Some of these are NOS and some are pulls, and you can evaluate that based on the photos and documentation. I have invested my own money in buying and testing a bunch of these .

Thanks for the feedback
The philosophy is that maybe some sdiyers will prefer to spend time building and playing rather than hunting rare parts for some of these cooler older modules... And some people who care about quality of their own builds might appreciate some time put into kitting, especially if overall cost is lower than the individual buy. It's a lousy business model, and not scalable, but fun and gratifying when you don't know the first thing about circuit design itself

Yes... At one time I think Blacet produced a smaller format pcb that was used for Frac and probably easier to convert for euro, maybe with enough retro interest he could be persuaded to produce another batch. But youd have the power conversion issues to sort as well

Yes... At one time I think Blacet produced a smaller format PCB that was used for Frac and probably easier to convert for Euro, maybe with enough retro interest he could be persuaded to produce another batch

+1 for me if this happen!

I bought one 5u kit to try to put in in euro format in any possible way (maybe in diagonal i dont know)

also...what about the 12 volts? somebody know if it will be difficult to adapt it?_________________BEFACO:
DIY MODULAR WORKSHOPS
www.befaco.org
befacosynth((at))gmail.com

You cannot post new topics in this forumYou cannot reply to topics in this forumYou cannot edit your posts in this forumYou cannot delete your posts in this forumYou cannot vote in polls in this forumYou cannot attach files in this forumYou can download files in this forum

Please support our site. If you click through and buy from our affiliate partners, we earn a small commission.